Vaisala AQT530, Руководство по настройке

Страница: 23 / 64

2. Using a terminal program, define the settings for the RS-485 interface.
• To use the RS-485 port in Modbus ASCII mode, type the following:
set rs485_baud=9600
set rs485_mode=1
set rs485_databits=7
set rs485_parity=e
set rs485_stopbits=1
write --really
• Bit rate: 9600 bps
• Mode: ASCII
• Port settings: 7E1 (7 data bits, even parity, 1 stop bit)
• To use the RS-485 port in Modbus RTU mode, type the following:
set rs485_baud=19200
set rs485_mode=4
set rs485_databits=8
set rs485_parity=e
set rs485_stopbits=1
write --really
• Bit rate: 19200
• Mode: RTU
• Port settings: 8E1 (8 data bits, even parity, 1 stop bit)
3. The device is ready.
More information
‣
Changing configuration parameter (set command) (page 35)
‣
Saving to non-volatile memory (write command) (page 42)
‣
Modbus register addresses for AQT530 (page 45)
4.3 Configuring ASCII CSV data sending
The ASCII CSV output mode is an alternative to AQT530 Modbus API. It is a simplified
measurement monitoring output for users that are only collecting data, without the ability
to control and monitor the AQT530 device otherwise.
The comma-separated values (CSV) output is sent automatically every 60 seconds. The
output contains 1 measurement from all measurement outputs on one line and with a
timestamp. The output data does not contain validity or device health information.
1. Establish a connection to AQT530.
Chapter 4 – CLI operation
21